How to get the damager in EntityDamageEvent

How do I get the damager in EntityDamageEvent?
I tried:

PHP:

if($entity->getLastDamageCause() instanceof EntityDamageByEntityEvent){
    $damager = $entity->getLastDamageCause()->getDamager();
    if($damager instanceof Player){
        $damager->sendMessage("Hi");
    }
}


but it didnt work, no errors or anything. But PhpStorm says getDamager() isn't a thing, but it is in EntityDamageByEntityEvent. Can someone help me out?

 

PHP:

if($event instanceof EntityDamageByEntityEvent){
    $damager = $event->getDamager();
    if($damager instanceof Player){
        $damager->sendMessage("Hi");
    }
}

 

already tried, didn't work

 

Have you imported the EntityDamageByEntityEvent and Player classes?